<?php

/**
 * @file
 * Contains \Drupal\book\Tests\BookTest.
 */

namespace Drupal\book\Tests;

use Drupal\Component\Utility\SafeMarkup;
use Drupal\Core\Cache\Cache;
use Drupal\Core\Entity\EntityInterface;
use Drupal\simpletest\WebTestBase;
use Drupal\user\RoleInterface;

/**
 * Create a book, add pages, and test book interface.
 *
 * @group book
 */
class BookTest extends WebTestBase {

  /**
   * Modules to install.
   *
   * @var array
   */
  public static $modules = array('book', 'block', 'node_access_test', 'book_test');

  /**
   * A book node.
   *
   * @var \Drupal\node\NodeInterface
   */
  protected $book;

  /**
   * A user with permission to create and edit books.
   *
   * @var object
   */
  protected $bookAuthor;

  /**
   * A user with permission to view a book and access printer-friendly version.
   *
   * @var object
   */
  protected $webUser;

  /**
   * A user with permission to create and edit books and to administer blocks.
   *
   * @var object
   */
  protected $adminUser;

  /**
   * A user without the 'node test view' permission.
   *
   * @var \Drupal\user\UserInterface
   */
  protected $webUserWithoutNodeAccess;

  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp();
    $this->drupalPlaceBlock('system_breadcrumb_block');
    $this->drupalPlaceBlock('page_title_block');

    // node_access_test requires a node_access_rebuild().
    node_access_rebuild();

    // Create users.
    $this->bookAuthor = $this->drupalCreateUser(array('create new books', 'create book content', 'edit own book content', 'add content to books'));
    $this->webUser = $this->drupalCreateUser(array('access printer-friendly version', 'node test view'));
    $this->webUserWithoutNodeAccess = $this->drupalCreateUser(array('access printer-friendly version'));
    $this->adminUser = $this->drupalCreateUser(array('create new books', 'create book content', 'edit any book content', 'delete any book content', 'add content to books', 'administer blocks', 'administer permissions', 'administer book outlines', 'node test view', 'administer content types', 'administer site configuration'));
  }

  /**
   * Creates a new book with a page hierarchy.
   *
   * @return \Drupal\node\NodeInterface[]
   */
  function createBook() {
    // Create new book.
    $this->drupalLogin($this->bookAuthor);

    $this->book = $this->createBookNode('new');
    $book = $this->book;

    /*
     * Add page hierarchy to book.
     * Book
     *  |- Node 0
     *   |- Node 1
     *   |- Node 2
     *  |- Node 3
     *  |- Node 4
     */
    $nodes = array();
    $nodes[] = $this->createBookNode($book->id()); // Node 0.
    $nodes[] = $this->createBookNode($book->id(), $nodes[0]->book['nid']); // Node 1.
    $nodes[] = $this->createBookNode($book->id(), $nodes[0]->book['nid']); // Node 2.
    $nodes[] = $this->createBookNode($book->id()); // Node 3.
    $nodes[] = $this->createBookNode($book->id()); // Node 4.

    $this->drupalLogout();

    return $nodes;
  }

  /**
   * Tests the book navigation cache context.
   *
   * @see \Drupal\book\Cache\BookNavigationCacheContext
   */
  public function testBookNavigationCacheContext() {
    // Create a page node.
    $this->drupalCreateContentType(['type' => 'page']);
    $page = $this->drupalCreateNode();

    // Create a book, consisting of book nodes.
    $book_nodes = $this->createBook();

    // Enable the debug output.
    \Drupal::state()->set('book_test.debug_book_navigation_cache_context', TRUE);
    Cache::invalidateTags(['book_test.debug_book_navigation_cache_context']);

    $this->drupalLogin($this->bookAuthor);

    // On non-node route.
    $this->drupalGet($this->adminUser->urlInfo());
    $this->assertRaw('[route.book_navigation]=book.none');

    // On non-book node route.
    $this->drupalGet($page->urlInfo());
    $this->assertRaw('[route.book_navigation]=book.none');

    // On book node route.
    $this->drupalGet($book_nodes[0]->urlInfo());
    $this->assertRaw('[route.book_navigation]=0|2|3');
    $this->drupalGet($book_nodes[1]->urlInfo());
    $this->assertRaw('[route.book_navigation]=0|2|3|4');
    $this->drupalGet($book_nodes[2]->urlInfo());
    $this->assertRaw('[route.book_navigation]=0|2|3|5');
    $this->drupalGet($book_nodes[3]->urlInfo());
    $this->assertRaw('[route.book_navigation]=0|2|6');
    $this->drupalGet($book_nodes[4]->urlInfo());
    $this->assertRaw('[route.book_navigation]=0|2|7');
  }

  /**
   * Tests saving the book outline on an empty book.
   */
  function testEmptyBook() {
    // Create a new empty book.
    $this->drupalLogin($this->bookAuthor);
    $book = $this->createBookNode('new');
    $this->drupalLogout();

    // Log in as a user with access to the book outline and save the form.
    $this->drupalLogin($this->adminUser);
    $this->drupalPostForm('admin/structure/book/' . $book->id(), array(), t('Save book pages'));
    $this->assertText(t('Updated book @book.', array('@book' => $book->label())));
  }

  /**
   * Tests book functionality through node interfaces.
   */
  function testBook() {
    // Create new book.
    $nodes = $this->createBook();
    $book = $this->book;

    $this->drupalLogin($this->webUser);

    // Check that book pages display along with the correct outlines and
    // previous/next links.
    $this->checkBookNode($book, array($nodes[0], $nodes[3], $nodes[4]), FALSE, FALSE, $nodes[0], array());
    $this->checkBookNode($nodes[0], array($nodes[1], $nodes[2]), $book, $book, $nodes[1], array($book));
    $this->checkBookNode($nodes[1], NULL, $nodes[0], $nodes[0], $nodes[2], array($book, $nodes[0]));
    $this->checkBookNode($nodes[2], NULL, $nodes[1], $nodes[0], $nodes[3], array($book, $nodes[0]));
    $this->checkBookNode($nodes[3], NULL, $nodes[2], $book, $nodes[4], array($book));
    $this->checkBookNode($nodes[4], NULL, $nodes[3], $book, FALSE, array($book));

    $this->drupalLogout();
    $this->drupalLogin($this->bookAuthor);

    // Check the presence of expected cache tags.
    $this->drupalGet('node/add/book');
    $this->assertCacheTag('config:book.settings');

    /*
     * Add Node 5 under Node 3.
     * Book
     *  |- Node 0
     *   |- Node 1
     *   |- Node 2
     *  |- Node 3
     *   |- Node 5
     *  |- Node 4
     */
    $nodes[] = $this->createBookNode($book->id(), $nodes[3]->book['nid']); // Node 5.
    $this->drupalLogout();
    $this->drupalLogin($this->webUser);
    // Verify the new outline - make sure we don't get stale cached data.
    $this->checkBookNode($nodes[3], array($nodes[5]), $nodes[2], $book, $nodes[5], array($book));
    $this->checkBookNode($nodes[4], NULL, $nodes[5], $book, FALSE, array($book));
    $this->drupalLogout();
    // Create a second book, and move an existing book page into it.
    $this->drupalLogin($this->bookAuthor);
    $other_book = $this->createBookNode('new');
    $node = $this->createBookNode($book->id());
    $edit = array('book[bid]' => $other_book->id());
    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));

    $this->drupalLogout();
    $this->drupalLogin($this->webUser);

    // Check that the nodes in the second book are displayed correctly.
    // First we must set $this->book to the second book, so that the
    // correct regex will be generated for testing the outline.
    $this->book = $other_book;
    $this->checkBookNode($other_book, array($node), FALSE, FALSE, $node, array());
    $this->checkBookNode($node, NULL, $other_book, $other_book, FALSE, array($other_book));

    // Test that we can save a book programatically.
    $this->drupalLogin($this->bookAuthor);
    $book = $this->createBookNode('new');
    $book->save();
  }

  /**
   * Checks the outline of sub-pages; previous, up, and next.
   *
   * Also checks the printer friendly version of the outline.
   *
   * @param \Drupal\Core\Entity\EntityInterface $node
   *   Node to check.
   * @param $nodes
   *   Nodes that should be in outline.
   * @param $previous
   *   (optional) Previous link node. Defaults to FALSE.
   * @param $up
   *   (optional) Up link node. Defaults to FALSE.
   * @param $next
   *   (optional) Next link node. Defaults to FALSE.
   * @param array $breadcrumb
   *   The nodes that should be displayed in the breadcrumb.
   */
  function checkBookNode(EntityInterface $node, $nodes, $previous = FALSE, $up = FALSE, $next = FALSE, array $breadcrumb) {
    // $number does not use drupal_static as it should not be reset
    // since it uniquely identifies each call to checkBookNode().
    static $number = 0;
    $this->drupalGet('node/' . $node->id());

    // Check outline structure.
    if ($nodes !== NULL) {
      $this->assertPattern($this->generateOutlinePattern($nodes), format_string('Node @number outline confirmed.', array('@number' => $number)));
    }
    else {
      $this->pass(format_string('Node %number does not have outline.', array('%number' => $number)));
    }

    // Check previous, up, and next links.
    if ($previous) {
      /** @var \Drupal\Core\Url $url */
      $url = $previous->urlInfo();
      $url->setOptions(array('attributes' => array('rel' => array('prev'), 'title' => t('Go to previous page'))));
      $text = SafeMarkup::format('<b>‹</b> @label', array('@label' => $previous->label()));
      $this->assertRaw(\Drupal::l($text, $url), 'Previous page link found.');
    }

    if ($up) {
      /** @var \Drupal\Core\Url $url */
      $url = $up->urlInfo();
      $url->setOptions(array('attributes' => array('title' => t('Go to parent page'))));
      $this->assertRaw(\Drupal::l('Up', $url), 'Up page link found.');
    }

    if ($next) {
      /** @var \Drupal\Core\Url $url */
      $url = $next->urlInfo();
      $url->setOptions(array('attributes' => array('rel' => array('next'), 'title' => t('Go to next page'))));
      $text = SafeMarkup::format('@label <b>›</b>', array('@label' => $next->label()));
      $this->assertRaw(\Drupal::l($text, $url), 'Next page link found.');
    }

    // Compute the expected breadcrumb.
    $expected_breadcrumb = array();
    $expected_breadcrumb[] = \Drupal::url('<front>');
    foreach ($breadcrumb as $a_node) {
      $expected_breadcrumb[] = $a_node->url();
    }

    // Fetch links in the current breadcrumb.
    $links = $this->xpath('//nav[@class="breadcrumb"]/ol/li/a');
    $got_breadcrumb = array();
    foreach ($links as $link) {
      $got_breadcrumb[] = (string) $link['href'];
    }

    // Compare expected and got breadcrumbs.
    $this->assertIdentical($expected_breadcrumb, $got_breadcrumb, 'The breadcrumb is correctly displayed on the page.');

    // Check printer friendly version.
    $this->drupalGet('book/export/html/' . $node->id());
    $this->assertText($node->label(), 'Printer friendly title found.');
    $this->assertRaw($node->body->processed, 'Printer friendly body found.');

    $number++;
  }

  /**
   * Creates a regular expression to check for the sub-nodes in the outline.
   *
   * @param array $nodes
   *   An array of nodes to check in outline.
   *
   * @return string
   *   A regular expression that locates sub-nodes of the outline.
   */
  function generateOutlinePattern($nodes) {
    $outline = '';
    foreach ($nodes as $node) {
      $outline .= '(node\/' . $node->id() . ')(.*?)(' . $node->label() . ')(.*?)';
    }

    return '/<nav id="book-navigation-' . $this->book->id() . '"(.*?)<ul(.*?)' . $outline . '<\/ul>/s';
  }

  /**
   * Creates a book node.
   *
   * @param int|string $book_nid
   *   A book node ID or set to 'new' to create a new book.
   * @param int|null $parent
   *   (optional) Parent book reference ID. Defaults to NULL.
   *
   * @return \Drupal\node\NodeInterface
   *   The created node.
   */
  function createBookNode($book_nid, $parent = NULL) {
    // $number does not use drupal_static as it should not be reset
    // since it uniquely identifies each call to createBookNode().
    static $number = 0; // Used to ensure that when sorted nodes stay in same order.

    $edit = array();
    $edit['title[0][value]'] = str_pad($number, 2, '0', STR_PAD_LEFT) . ' - SimpleTest test node ' . $this->randomMachineName(10);
    $edit['body[0][value]'] = 'SimpleTest test body ' . $this->randomMachineName(32) . ' ' . $this->randomMachineName(32);
    $edit['book[bid]'] = $book_nid;

    if ($parent !== NULL) {
      $this->drupalPostForm('node/add/book', $edit, t('Change book (update list of parents)'));

      $edit['book[pid]'] = $parent;
      $this->drupalPostForm(NULL, $edit, t('Save'));
      // Make sure the parent was flagged as having children.
      $parent_node = \Drupal::entityManager()->getStorage('node')->loadUnchanged($parent);
      $this->assertFalse(empty($parent_node->book['has_children']), 'Parent node is marked as having children');
    }
    else {
      $this->drupalPostForm('node/add/book', $edit, t('Save'));
    }

    // Check to make sure the book node was created.
    $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
    $this->assertNotNull(($node === FALSE ? NULL : $node), 'Book node found in database.');
    $number++;

    return $node;
  }

  /**
   * Tests book export ("printer-friendly version") functionality.
   */
  function testBookExport() {
    // Create a book.
    $nodes = $this->createBook();

    // Login as web user and view printer-friendly version.
    $this->drupalLogin($this->webUser);
    $this->drupalGet('node/' . $this->book->id());
    $this->clickLink(t('Printer-friendly version'));

    // Make sure each part of the book is there.
    foreach ($nodes as $node) {
      $this->assertText($node->label(), 'Node title found in printer friendly version.');
      $this->assertRaw($node->body->processed, 'Node body found in printer friendly version.');
    }

    // Make sure we can't export an unsupported format.
    $this->drupalGet('book/export/foobar/' . $this->book->id());
    $this->assertResponse('404', 'Unsupported export format returned "not found".');

    // Make sure we get a 404 on a not existing book node.
    $this->drupalGet('book/export/html/123');
    $this->assertResponse('404', 'Not existing book node returned "not found".');

    // Make sure an anonymous user cannot view printer-friendly version.
    $this->drupalLogout();

    // Load the book and verify there is no printer-friendly version link.
    $this->drupalGet('node/' . $this->book->id());
    $this->assertNoLink(t('Printer-friendly version'), 'Anonymous user is not shown link to printer-friendly version.');

    // Try getting the URL directly, and verify it fails.
    $this->drupalGet('book/export/html/' . $this->book->id());
    $this->assertResponse('403', 'Anonymous user properly forbidden.');

    // Now grant anonymous users permission to view the printer-friendly
    // version and verify that node access restrictions still prevent them from
    // seeing it.
    user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access printer-friendly version'));
    $this->drupalGet('book/export/html/' . $this->book->id());
    $this->assertResponse('403', 'Anonymous user properly forbidden from seeing the printer-friendly version when denied by node access.');
  }

  /**
   * Tests the functionality of the book navigation block.
   */
  function testBookNavigationBlock() {
    $this->drupalLogin($this->adminUser);

    // Enable the block.
    $block = $this->drupalPlaceBlock('book_navigation');

    // Give anonymous users the permission 'node test view'.
    $edit = array();
    $edit[RoleInterface::ANONYMOUS_ID . '[node test view]'] = TRUE;
    $this->drupalPostForm('admin/people/permissions/' . RoleInterface::ANONYMOUS_ID, $edit, t('Save permissions'));
    $this->assertText(t('The changes have been saved.'), "Permission 'node test view' successfully assigned to anonymous users.");

    // Test correct display of the block.
    $nodes = $this->createBook();
    $this->drupalGet('<front>');
    $this->assertText($block->label(), 'Book navigation block is displayed.');
    $this->assertText($this->book->label(), format_string('Link to book root (@title) is displayed.', array('@title' => $nodes[0]->label())));
    $this->assertNoText($nodes[0]->label(), 'No links to individual book pages are displayed.');
  }

  /**
   * Tests BookManager::getTableOfContents().
   */
  public function testGetTableOfContents() {
    // Create new book.
    $nodes = $this->createBook();
    $book = $this->book;

    $this->drupalLogin($this->bookAuthor);

    /*
     * Add Node 5 under Node 2.
     * Add Node 6, 7, 8, 9, 10, 11 under Node 3.
     * Book
     *  |- Node 0
     *   |- Node 1
     *   |- Node 2
     *    |- Node 5
     *  |- Node 3
     *   |- Node 6
     *    |- Node 7
     *     |- Node 8
     *      |- Node 9
     *       |- Node 10
     *        |- Node 11
     *  |- Node 4
     */
    foreach ([5 => 2, 6 => 3, 7 => 6, 8 => 7, 9 => 8, 10 => 9, 11 => 10] as $child => $parent) {
      $nodes[$child] = $this->createBookNode($book->id(), $nodes[$parent]->id());
    }
    $this->drupalGet($nodes[0]->toUrl('edit-form'));
    // Snice Node 0 has children 2 levels deep, nodes 10 and 11 should not
    // appear in the selector.
    $this->assertNoOption('edit-book-pid', $nodes[10]->id());
    $this->assertNoOption('edit-book-pid', $nodes[11]->id());
    // Node 9 should be available as an option.
    $this->assertOption('edit-book-pid', $nodes[9]->id());

    // Get a shallow set of options.
    /** @var \Drupal\book\BookManagerInterface $manager */
    $manager = $this->container->get('book.manager');
    $options = $manager->getTableOfContents($book->id(), 3);
    $expected_nids = [$book->id(), $nodes[0]->id(), $nodes[1]->id(), $nodes[2]->id(), $nodes[3]->id(), $nodes[6]->id(), $nodes[4]->id()];
    $this->assertEqual(count($options), count($expected_nids));
    $diff = array_diff($expected_nids, array_keys($options));
    $this->assertTrue(empty($diff), 'Found all expected option keys');
    // Exclude Node 3.
    $options = $manager->getTableOfContents($book->id(), 3, array($nodes[3]->id()));
    $expected_nids = array($book->id(), $nodes[0]->id(), $nodes[1]->id(), $nodes[2]->id(), $nodes[4]->id());
    $this->assertEqual(count($options), count($expected_nids));
    $diff = array_diff($expected_nids, array_keys($options));
    $this->assertTrue(empty($diff), 'Found all expected option keys after excluding Node 3');
  }

  /**
   * Tests the book navigation block when an access module is installed.
   */
  function testNavigationBlockOnAccessModuleInstalled() {
    $this->drupalLogin($this->adminUser);
    $block = $this->drupalPlaceBlock('book_navigation', array('block_mode' => 'book pages'));

    // Give anonymous users the permission 'node test view'.
    $edit = array();
    $edit[RoleInterface::ANONYMOUS_ID . '[node test view]'] = TRUE;
    $this->drupalPostForm('admin/people/permissions/' . RoleInterface::ANONYMOUS_ID, $edit, t('Save permissions'));
    $this->assertText(t('The changes have been saved.'), "Permission 'node test view' successfully assigned to anonymous users.");

    // Create a book.
    $this->createBook();

    // Test correct display of the block to registered users.
    $this->drupalLogin($this->webUser);
    $this->drupalGet('node/' . $this->book->id());
    $this->assertText($block->label(), 'Book navigation block is displayed to registered users.');
    $this->drupalLogout();

    // Test correct display of the block to anonymous users.
    $this->drupalGet('node/' . $this->book->id());
    $this->assertText($block->label(), 'Book navigation block is displayed to anonymous users.');

    // Test the 'book pages' block_mode setting.
    $this->drupalGet('<front>');
    $this->assertNoText($block->label(), 'Book navigation block is not shown on non-book pages.');
  }

  /**
   * Tests the access for deleting top-level book nodes.
   */
   function testBookDelete() {
     $node_storage = $this->container->get('entity.manager')->getStorage('node');
     $nodes = $this->createBook();
     $this->drupalLogin($this->adminUser);
     $edit = array();

     // Test access to delete top-level and child book nodes.
     $this->drupalGet('node/' . $this->book->id() . '/outline/remove');
     $this->assertResponse('403', 'Deleting top-level book node properly forbidden.');
     $this->drupalPostForm('node/' . $nodes[4]->id() . '/outline/remove', $edit, t('Remove'));
     $node_storage->resetCache(array($nodes[4]->id()));
     $node4 = $node_storage->load($nodes[4]->id());
     $this->assertTrue(empty($node4->book), 'Deleting child book node properly allowed.');

     // Delete all child book nodes and retest top-level node deletion.
     foreach ($nodes as $node) {
       $nids[] = $node->id();
     }
     entity_delete_multiple('node', $nids);
     $this->drupalPostForm('node/' . $this->book->id() . '/outline/remove', $edit, t('Remove'));
     $node_storage->resetCache(array($this->book->id()));
     $node = $node_storage->load($this->book->id());
     $this->assertTrue(empty($node->book), 'Deleting childless top-level book node properly allowed.');

     // Tests directly deleting a book parent.
     $nodes = $this->createBook();
     $this->drupalLogin($this->adminUser);
     $this->drupalGet($this->book->urlInfo('delete-form'));
     $this->assertRaw(t('%title is part of a book outline, and has associated child pages. If you proceed with deletion, the child pages will be relocated automatically.', ['%title' => $this->book->label()]));
     // Delete parent, and visit a child page.
     $this->drupalPostForm($this->book->urlInfo('delete-form'), [], t('Delete'));
     $this->drupalGet($nodes[0]->urlInfo());
     $this->assertResponse(200);
     $this->assertText($nodes[0]->label());
     // The book parents should be updated.
     $node_storage = \Drupal::entityTypeManager()->getStorage('node');
     $node_storage->resetCache();
     $child = $node_storage->load($nodes[0]->id());
     $this->assertEqual($child->id(), $child->book['bid'], 'Child node book ID updated when parent is deleted.');
     // 3rd-level children should now be 2nd-level.
     $second = $node_storage->load($nodes[1]->id());
     $this->assertEqual($child->id(), $second->book['bid'], '3rd-level child node is now second level when top-level node is deleted.');
   }

  /**
   * Tests re-ordering of books.
   */
  public function testBookOrdering() {
    // Create new book.
    $this->createBook();
    $book = $this->book;

    $this->drupalLogin($this->adminUser);
    $node1 = $this->createBookNode($book->id());
    $node2 = $this->createBookNode($book->id());
    $pid = $node1->book['nid'];

    // Head to admin screen and attempt to re-order.
    $this->drupalGet('admin/structure/book/' . $book->id());
    $edit = array(
      "table[book-admin-{$node1->id()}][weight]" => 1,
      "table[book-admin-{$node2->id()}][weight]" => 2,
      // Put node 2 under node 1.
      "table[book-admin-{$node2->id()}][pid]" => $pid,
    );
    $this->drupalPostForm(NULL, $edit, t('Save book pages'));
    // Verify weight was updated.
    $this->assertFieldByName("table[book-admin-{$node1->id()}][weight]", 1);
    $this->assertFieldByName("table[book-admin-{$node2->id()}][weight]", 2);
    $this->assertFieldByName("table[book-admin-{$node2->id()}][pid]", $pid);
  }

  /**
   * Tests outline of a book.
   */
  public function testBookOutline() {
    $this->drupalLogin($this->bookAuthor);

    // Create new node not yet a book.
    $empty_book = $this->drupalCreateNode(array('type' => 'book'));
    $this->drupalGet('node/' . $empty_book->id() . '/outline');
    $this->assertNoLink(t('Book outline'), 'Book Author is not allowed to outline');

    $this->drupalLogin($this->adminUser);
    $this->drupalGet('node/' . $empty_book->id() . '/outline');
    $this->assertRaw(t('Book outline'));
    $this->assertOptionSelected('edit-book-bid', 0, 'Node does not belong to a book');
    $this->assertNoLink(t('Remove from book outline'));

    $edit = array();
    $edit['book[bid]'] = '1';
    $this->drupalPostForm('node/' . $empty_book->id() . '/outline', $edit, t('Add to book outline'));
    $node = \Drupal::entityManager()->getStorage('node')->load($empty_book->id());
    // Test the book array.
    $this->assertEqual($node->book['nid'], $empty_book->id());
    $this->assertEqual($node->book['bid'], $empty_book->id());
    $this->assertEqual($node->book['depth'], 1);
    $this->assertEqual($node->book['p1'], $empty_book->id());
    $this->assertEqual($node->book['pid'], '0');

    // Create new book.
    $this->drupalLogin($this->bookAuthor);
    $book = $this->createBookNode('new');

    $this->drupalLogin($this->adminUser);
    $this->drupalGet('node/' . $book->id() . '/outline');
    $this->assertRaw(t('Book outline'));
    $this->clickLink(t('Remove from book outline'));
    $this->assertRaw(t('Are you sure you want to remove %title from the book hierarchy?', array('%title' => $book->label())));

    // Create a new node and set the book after the node was created.
    $node = $this->drupalCreateNode(array('type' => 'book'));
    $edit = array();
    $edit['book[bid]'] = $node->id();
    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
    $node = \Drupal::entityManager()->getStorage('node')->load($node->id());

    // Test the book array.
    $this->assertEqual($node->book['nid'], $node->id());
    $this->assertEqual($node->book['bid'], $node->id());
    $this->assertEqual($node->book['depth'], 1);
    $this->assertEqual($node->book['p1'], $node->id());
    $this->assertEqual($node->book['pid'], '0');

    // Test the form itself.
    $this->drupalGet('node/' . $node->id() . '/edit');
    $this->assertOptionSelected('edit-book-bid', $node->id());
  }

  /**
   * Tests that saveBookLink() returns something.
   */
  public function testSaveBookLink() {
    $book_manager = \Drupal::service('book.manager');

    // Mock a link for a new book.
    $link = array('nid' => 1, 'has_children' => 0, 'original_bid' => 0, 'parent_depth_limit' => 8, 'pid' => 0, 'weight' => 0, 'bid' => 1);
    $new = TRUE;

    // Save the link.
    $return = $book_manager->saveBookLink($link, $new);

    // Add the link defaults to $link so we have something to compare to the return from saveBookLink().
    $link += $book_manager->getLinkDefaults($link['nid']);

    // Test the return from saveBookLink.
    $this->assertEqual($return, $link);
  }

  /**
   * Tests the listing of all books.
   */
  public function testBookListing() {
    // Create a new book.
    $this->createBook();

    // Must be a user with 'node test view' permission since node_access_test is installed.
    $this->drupalLogin($this->webUser);

    // Load the book page and assert the created book title is displayed.
    $this->drupalGet('book');

    $this->assertText($this->book->label(), 'The book title is displayed on the book listing page.');
  }

  /**
   * Tests the administrative listing of all books.
   */
  public function testAdminBookListing() {
    // Create a new book.
    $this->createBook();

    // Load the book page and assert the created book title is displayed.
    $this->drupalLogin($this->adminUser);
    $this->drupalGet('admin/structure/book');
    $this->assertText($this->book->label(), 'The book title is displayed on the administrative book listing page.');
  }

  /**
   * Tests the administrative listing of all book pages in a book.
   */
  public function testAdminBookNodeListing() {
    // Create a new book.
    $this->createBook();
    $this->drupalLogin($this->adminUser);

    // Load the book page list and assert the created book title is displayed
    // and action links are shown on list items.
    $this->drupalGet('admin/structure/book/' . $this->book->id());
    $this->assertText($this->book->label(), 'The book title is displayed on the administrative book listing page.');

    $elements = $this->xpath('//table//ul[@class="dropbutton"]/li/a');
    $this->assertEqual((string) $elements[0], 'View', 'View link is found from the list.');
  }

  /**
   * Ensure the loaded book in hook_node_load() does not depend on the user.
   */
  public function testHookNodeLoadAccess() {
    \Drupal::service('module_installer')->install(['node_access_test']);

    // Ensure that the loaded book in hook_node_load() does NOT depend on the
    // current user.
    $this->drupalLogin($this->bookAuthor);
    $this->book = $this->createBookNode('new');
    // Reset any internal static caching.
    $node_storage = \Drupal::entityManager()->getStorage('node');
    $node_storage->resetCache();

    // Login as user without access to the book node, so no 'node test view'
    // permission.
    // @see node_access_test_node_grants().
    $this->drupalLogin($this->webUserWithoutNodeAccess);
    $book_node = $node_storage->load($this->book->id());
    $this->assertTrue(!empty($book_node->book));
    $this->assertEqual($book_node->book['bid'], $this->book->id());

    // Reset the internal cache to retrigger the hook_node_load() call.
    $node_storage->resetCache();

    $this->drupalLogin($this->webUser);
    $book_node = $node_storage->load($this->book->id());
    $this->assertTrue(!empty($book_node->book));
    $this->assertEqual($book_node->book['bid'], $this->book->id());
  }

}
